Saucers

4 clues
Dishes
Sci-fi ships
Some sightings
Ufologist's concern
Similar answers:
A1sauce
Acers
Aerialassault
Aflyingsauceris
Allosaur
Allosaurus
Allosauruses
Andspecialsauce
Ankylosaur
Announcers
Announcersbooth
Antibesauntie
Applesauce
Asaunit
Assault
Assaultandbattery
Assaultattack
Assaulted
Assaultedbutter
Assaulting